Abstract: A machine tool comprises at least one spindle (13). Tool changers (27) for exchanging tools (31) are associated with said spindle (13). The spindle (13) is fitted with a facing head (60). The facing head (60) comprises means for numerically controlled displacement of a facing tool (69) in a direction (r) perpendicular to the axis (23) of the spindle (13). The tool changer associated with the spindle (13) is configured for exchanging facing tools (69) (FIG. 2).

Abstract: A machine tool comprises a headstock (12) having a rotatable spindle (16) and having motor means for rotatably driving said spindle (16). At least one gripper (26) is provided for gripping a tool holder (18) and for transferring same from a first, uncoupled position outside said spindle (16) into a second, ready-to-couple position within said spindle (16). Coupling means (35) are provided at said headstock (12) for coupling said tool holder (18) in said second, ready-to-couple position with said spindle (16) such that said tool holder (18) assumes one of at least two coupled conditions, whereby in such coupled condition said tool holder (18) is locked on said spindle (16) for rotation therewith. Said at least two coupled conditions differ from one another with respect to a relative angular alignment between said tool holder (18) and said spindle (16).

Abstract: A machine tool (10) has a revolving spindle (14) borne in a spindle tube (13) which has a locating opening (15) to receive tool holders; (16, 17). A tool magazine (55) is also provided to hold a number of tool holders. Moreover, a tool changer (18) with at least two gripper arms (21, 22) is provided to transport tool holders; (16, 17) between a transfer position (23) in the area of the tool magazine (55) and a common spindle position (24) beneath the locating opening (15). A holding device (31) bearing the tool changer (18) is borne on the spindle tube (13) in such a way that it can be moved longitudinally in the sense of a stroke movement (33) and transfer the respective tool holder (16) from the spindle position (24) into its working position in the locating opening (15). The holding device (31) is borne on the spindle tube (13) along its longitudinal axis so that it can be rotated in such a way that the gripper arms (21, 22) have a common transfer position (23) to the tool magazine (55).

Abstract: A machine tool, in particular a long-bed machine tool, comprises a column (11) that can be displaced in at least a first axis (13), and at least one spindle (15) clamped rotatably at support points (22, 23) in the region of its two outer ends (20, 21). The spindle (15, 16) extends parallel to the first axis (13) and is joined to the column (11) in such a way that when the spindle (15) rotates, the column (11) is displaced in the first axis (13). A damping apparatus (28) acting on the spindle (15) between the support points (22, 23), which damps any vibrations of the spindle, is provided on the machine tool. The damping mechanism (28) is displaceable along the first axis (13) at least to some extent independently from the column (11).

Abstract: A machine tool comprises a tool exchanger for exchanging tools between a vertical-axis spindle and a load/unload position of a tool magazine. The load/unload position is located, in a front view of the machine tool, above the spindle and laterally offset therefrom. The tool exchanger, further, comprises two exchanger arms operating reciprocally, each contributing to conveying a first tool from the spindle to the load/unload position and, simultaneously, a second tool from the load/unload position to the spindle. The exchanger arms are each rotatable about one separate axis only. Each of the exchanger arms exchanges its associated tool between the spindle and one separate transfer position each. The two transfer positions associated to the two exchanger arms are located at different distances in front of the load/unload position on the tool magazine. Further, a transfer device is provided for transferring the tools between the load/unload position and, alternately, one of the transfer positions.

Abstract: A machine tool comprises a workpiece table that can rotate about a vertical axis. A first spray shielding panel is rigidly attached to the workpiece table substantially along one diameter thereof. It divides the workpiece table into a placement side and a machining side. A second spray shielding panel is stationary and is arranged above the first spray shielding panel, and runs substantially parallel thereto. An articulated third spray shielding panel connects the first and second spray shielding panel to one another. It is connected at its top in a hinged manner to the second spray shielding panel and is provided with a channel at its bottom that encloses an upper edge of the first spray shielding panel over a finite length.

Abstract: A tool changer for tools of a machine tool has a gripper on which two movable jaws are arranged for positive gripping of the tools and on which is mounted an actuation element which is axially displaceable in the longitudinal axis and swings the jaws around their respective pivot axis into a spread position for inserting and removing the tools and into a closed position for positive gripping of the tools. Between the actuation element and each of the two jaws there are provided one opening linkage and one closing linkage each. Each of the two opening linkages has an oblique surface provided on the actuation element that interacts with an opposing surface provided on the jaw for opening the respective jaw. Each of the two closing linkages has a guide bevel provided on the actuation element which interacts in each case by means of an associated rolling element with a contact surface provided on the jaw for closing the respective jaw. The two closing linkages positively lock the jaws in the closed position.

Abstract: A machine tool is disclosed having an inverted spotfacer chucked in a rotatable tapered spindle socket. The inverted spotfacer comprises an actuation shaft being rigidly axially connected to a tapered shank which, in turn, is chucked in the socket. A shoulder element can be displaced on the actuation shaft against the force of a spring. Further, a positive control mechanism acts between the actuation shaft and the shoulder element. Due to the action of the positive control mechanism, when axially displacing the actuation shaft relative to the shoulder element, a cutting tool arranged tiltably at the lower end of the actuation shaft may be tilted between two operational positions. In the first operational position the cutting tool extends parallel to the longitudinal axis of the spotfacer, whereas in the second operational position the cutting tool extends perpendicularly to the spotfacer axis, the second operational position being the position in which the spotfacer may make countersunk bores on workpieces.

Abstract: In the case of a machine tool having at least one tool changer for exchanging the tools of the machine tool, the tool changer comprises a gripper (13) provided with at least one movable jaw for form-locking engagement of the tools. The gripper (13) is further equipped with an actuating member (24), which is arranged for axial displacement in the longitudinal direction (30) and which, depending on its axial position, acts to open the at least one jaw for the purpose of inserting or removing the tools, or to close it for form-locking engagement of the tools. The actuating member (24) can be displaced into a first axial end position, by moving the gripper (13) asgainst a stationary stop (31) of the machine tool, for opening the at least one jaw, and can further be transferred, by closing means, into a second axial end position for closing the at least one jaw, as the gripper (13) is moved away from the stop (31).

Abstract: A machine tool comprises a spindle stock and a worktable having an upper surface thereon for mounting and machining workpieces. The worktable and the spindle stock are alternatively displaceable relative to each other in a plane parallel to the upper surface from a first position at which a first portion of the upper surface is disposed proximate the spindle stock and serves as a processing area and a second portion of said upper surface is disposed distal to said spindle stock and serves as a mounting area, to a second position at which the upper surface second portion is disposed proximate the spindle stock and serves as a processing area and the upper surface first portion is disposed distal to the spindle stock and serves as a mounting area. A splash guard wall is provided for separating the processing in the mounting areas. The splash guard wall is attached to the table upper surface by means of a hinge defining a first pivot axis.

Abstract: A machine tool comprises a motion unit that can be displaced relative to a work table along a horizontal axis. Guide rails extend in the direction of the axis, being fixed against movement in this direction. Supporting guide elements of the motion unit run on the guide rails in axially offset arrangement. A drive motor serves for effecting a relative movement between the motion unit and the guide rails.In order to reduce the overall depth of the machine tool in the direction of the axis and to improve the accessibility of the drive elements, the drive motor has its stator rigidly connected to the said motion unit and is arranged in substantially axial orientation between the said guide elements.

Abstract: A machine tool comprises a spindle stock and a worktable having an upper surface thereon for mounting and machining workpieces. The worktable and the spindle stock are alternatively displaceable relative to each other in a plane parallel to the upper surface from a first position at which a first portion of the upper surface is disposed proximate the spindle stock and serves as a processing area and a second portion of said upper surface is disposed distal to said spindle stock and serves as a mounting area, to a second postion at which the upper surface second portion is disposed proximate the spindle stock and serves as a processing area and the upper surface first portion is disposed to the spindle stock and serves as a mounting area. A splash guard wall is provided for separating the processing in the mounting areas. The splash guard wall is attached to the table upper surface by means of a hinge defining a first pivot axis.

Abstract: A machine tool is provided with an enclosure with a charging door (10) arranged therein. In a first end position, the charging door closes the enclosure against the outside while in a second end position it occupies a position in which it is pivoted substantially about a horizontal axis in its upper portion. In this latter position, the lower rim of the charging door (10) is displaced into the interior of the enclosure. The charging door (10) is guided during its movement in such a manner that its lower edge is located at a higher level between the two end positions than in the said end positions.In order to facilitate opening and closing of the door for an operator, a power-operated drive (95, 100, 101) is arranged in a lateral bay (90) in the enclosure for opening and closing the charging door (10).

Abstract: A machine tool comprises a tool exchange mechanism for transferring various tool holders from a magazine position into a working position of a rotating spindle of the machine tool. In order to minimize tool change times for standardized and non-standardized tool holders, frictional means between the tool holders and grippers of the tool exchange mechanism are provided as well as locking mechanism for maintaining a predetermined rotational position of the tool holders in the tool exchange mechanism. Thus, the tool holders may be inserted into the rotating receiving opening of the spindle with a predetermined rotational position or, if the tool holder rotational position deviates from another predetermined rotational position of the rotating spindle, the search time for establishing a form-locking driving relation between the spindle and the tool holder is minimized.

Abstract: A machine tool comprises a displaceable work table (12) having a first area which in a first position in which it serves as the processing side carries workpieces for being processed by means of a tool of the machine tool, and a second area which in a second position in which it serves as the mounting side can receive another workpiece, the two positions of the said areas being exchangeable by displacement of the table (12), and at least one splash guard (28) which can be moved relative to the work table being arranged between the said table areas.In order to ensure that one always has a larger working space available on the processing side to permit the spindle stock to be moved over the full area and to permit bulky and/or heavy workpieces to be loaded on the surface of the work table (12) from the mounting side, the splash guard (28) subdivides the working space defined by the areas asymmetrically.

Abstract: A toolholder is provided for a machine tool having a magazine containing several toolholders from which a selected toolholder can be taken by means of an arm and introduced in a working position in a rotating receiving means of the machine tool. An arm with a holding part that can be rotated via a pivot bearing in the direction of the shaft of the receiving means, is applied to the toolholder. In order to prevent the rotatably disposed toolholder from being carried along in its rotation during introduction into the spindle of the machine tool by the form-fitting coupling means of the spindle, without said coupling means engaging with the toolholder, braking means are provided which, during the introduction of the toolholder into the rotating receiving means, increase the frictional connection between the holding piece and the toolholder.

Abstract: A machine tool for sequentially machining workpieces with different tools which may be clamped in a spindle of the machine tool, comprising a magazine in which the tools are disposed in a ring pattern and held in holders such that the holder of the tool to be clamped in or unclamped and removed from the spindle is in alignment with the spindle axis during the tool change, is characterized in that the holders of the magazine are distributed about the spindle axis, that each holder is provided with its own drive which moves it into a position where it is aligned with the spindle axis (clamping position) and into a position outside the spindle axis (magazine position) and that the holder remains aligned with the spindle axis while the tool held therein performs a machining operation. This permits a very quick tool change.